Ventilator



Patented Sept. 17, 1929 UNITED STATES PATENT Y HAROLD KNU'rsoN, oFgcHIoAGo, ILLINor l n r I ronA'rEn, A CORPORATION or ILLINOIS( vENrIL'ATon n Application med November 19, 1927. rserial No. 234,351;

the )members `7 are a plurality of brackets 8 on'the upper end portion of which' is mountedy a cap plate 9L adapted to overlie said membersy and pipe, while secured tothe i bracketsintermediate said cap plate andthe members 7 is an annular supplemental y'capi plate 1(1). s f

Mounted in the draft members' 7,r are a' plurality of partition platesy 11 suitably psitioned in the ymernhc'ers in yaymanner to' form af yplurality Y of radially spaced upf wardly tapered innerfandf outer passages therein, and having their upper. end por:r tionsterminating in a plane above 'the upper edge ofthe pipe 5-and below the `upper end portionsof the draft members 7. f It will begobserved' from fthe foregoing This invention relates to chimney #tops or ventilators and is intended to provide certain novel improvementsr in' a ventilator structure of the type disclosed by' Patent 5 No. 1,028,958 issued to Jesse L. Phillips, June 11, 1912, and` toimprove devices `of this character in sundry details hereinafter described and more particularly pointed outv in the appended claims. n

Among other objects, the present'invention is intended to provide a simple', durable and elcient' structure wherein the strong upward draft through the ventilator' is accelerated anda positive discharge from the top thereof 'is made more certain by reason of increased velocity of the wind* at the top of the chimney or ventilator shaft, due to a novelfconstruction and formation of elements comprisingthe top or hood.

One embodiment 'of the invention' is shown for illustrative' purposes inthe'ac# companying drawings, in which Fig. 1 is an elevational view, partly in section,lof a chimney or ventilator top emf bodying my invention, and'having portions thereof broken away to illustrate more clearly certain novel features of the invention, and f 4 Fig. 2 is 'a plan sectionl taken, as indicated by the line`22 of Fig. 1.

In the drawings, the numeral 5y desig-I nates a section of pipe adapted to ybe secured to the upper end of a chimneyy ory ventilator flue, and having formed in its upper, edge portion a plurality of uniformly spaced notches 6, preferably of substantially Vshapedform- Secured to the outer surface of the pipe 5 and suitably spaced therearound, preferably adjacent the notches 6, are a plurality of upwardly tapered U-shaped draft members 7 adapted to yco-operate with the outer surface of the ,pipe 5k in a manner to'form a plurality of uniformly spaced upwardly tapered passages outside the pipe and adjacent the notches 6.r

The upper endportions of the members 7 are adapted to terminate in a plane above the upper edgeof the pipe 5, and secured to the pipe and to theupper portions Q f sidesfof the "pipe 5 will;befdeflected@up1k wardly through the draft I'nembver's,towith-` inf'the supplemental cap plate 10 and thenceagainst `the cap plate I9 frombeneath which they-f will be discharged by other currents of air, and it will benoted also that by reason Aof the restriction of the 'air passages within the 'draft members 7,7a greater velocity of the air 'currents is inducedfad-y jacent the upper edge of the pipe and the upper edges of the members 7 thereby creating a vacuum within'the -pipe 5 yand accelerating the 'upwardymovement'yof the air withinfthe pipe and chimney yor ventilatorflue. I f l To'ffurther increase the'velocity kof theair currents through the innery passages formed betweenr the pipe 5 and the partition rplates 11,l a plurality of` outwardly and upwardly or ofthe 'pipes 5 than' would bethe case i these yflanges 12 were not provided. n

' To further increase the velocity of the 'air currents passing through the outer'passages form@ ybetween'the partition plates 11 'and s, AssIeNoRy To, rnnn nrcxri'son, ineen;

description that air currents imp inging the inclined flanges k,l2 are formedpreferably the outer wall of the draft members 7, in a manner to accelerate the. velocity of the air currents passing through the inner passages, a plurality of upwardly inclined flanges 13 are formed preferably along the upper edges of the partition plates 11, thereby further restricting the cross sectional draft area of the outer passages and increasing the velocity of the air passing therethrough.

It' will be observedy from the foregoing description that the increased velocity ofthe air currents passing through the outer 7pasj sages due to the restricted cross sectional draft area of these passages will create a vacuum adjacent the upper end of the inner passages, thereby accelerating the velocity o f the air currents passing through the restricted cross sectional draft area of said inner passages, and that the increasedfacceleration of the air currents adjacent the upperedge of the pipe 5 will tend to create a still greater vacuum within the upper portion of the pipe, thereby causing a strong upward f draft through vthe chimney or'ventilator flue to which my improved top may be applied.

If it is desired, the V-shaped not-ches 6 may be formed in the'upper edgeofthe chimney or ventilator flue itself and the draft members 7 and brackets 8 secured thereto, but it has been found convenient to mount the draft members and co-operating elements on a short section of pipe asindicatedin the drawings and attaching the said pipe to the upperA end of the chimney or ventilator flue.

Obviously,r Lthe present invention is not limited to the precise construction and arrangement shown and described, as the same may, be variously modified. Moreover, all of the features of the invention need not be used conjointly, as the same may be used to advantage in variously dierent combinations and sub-combinations.

y What I claim as my invention and desire to secure by Letters Patent is:

1.k In a chimney top'or ventilator, the combination with a pipe having a plurality of V-shaped notches formed in its upper edge, of a plurality of draft members positioned around said pipe and co-operable therewith in a manner to form a plurality of upwardly tapered passages outside said pipe and adjacent said notches, a capplate positioned above said pipe and members, and partitionV platesmounted wholly within said members intermediate the upper and lower end portions of the members in a manner to form a plurality of radially spaced passages within said members. c

2. lIn a chimney top or ventilator, the coinbination with a pipe having a plurality of V-'shaped notches formed in its upper edge, of a plurality of draft members positioned around said pipe and co-operable therewith in a manner to form a plurality of upwardlytapered passages outside said pipe and adof a plurality of draft members uniformly spaced around said pipe adjacent said notches and co-operable with said pipe in a manner to form a plurality of upwardly tapered passages outside said pipe and adjacent said notches, a cap plate positioned above said pipe and members, partition plates mounted in said members in a manner to form a plurality of radially spaced passages within said members, and outwardly extending flanges formed adjacent and eX- tending along the upper edges of said partition plates.

4. In a chimney top or ventilator, the combination with a pipe having a. plurality of V-shaped notches formed in its upper edge, of a plurality of U-shaped draft members uniformly spaced around said pipe adjacent said notches and co-operable with said pipe in a manner to form a plurality of upwardly tapered passages outside said pipe and adjacent said notches, a cap plate positioned above said pipe and members, partition plates mounted in said members in a manner to form a plurality of radially spaced inner and outer passages within said members, and outwardly inclined flanges formed adjacent and ext-ending along the upper edges of said partition plates in a manner to restrict the cross-sectional draft area of said outer passages adjacent the upper edges of said plates.

5. In a chimney top or ventilator, the combination with a pipe having a plurality of il-shaped notches formed in its upper edge, of a plurality of U-shaped draft members uniformly spaced around said pipe adjacent said notches and co-operable with said pipe in a manner to form a plurality of upwardly tapered passages outside said pipe and adjacent said notches, a cap plate positioned above said pipe land members, partition plates mounted in said members in a manner to form a plurality'of radially spaced inner and outer passages within said members, and outwardly extending inclined flanges. formed adjacent and extending along the sides of said notches in a manner to restrict the crosssectional draft area of said inner passages adjacent the upper edge of said pipe.

6. In a chimney top or ventilator, the conibination with a pipe having a plurality of V-shaped notches formed Yin its upper edge,

of a plurality of U-shaped draft members i uniformly spaced around said pipe adjacent said notches and co-operable with said pipe in a manner to Yform a plurahtyofupwardly tapered passages outside said pipe andadj f tion platesA` having outwardly andfupwardly inclined flanges. adjacent one oftheirjedge jacent said notches, a cap plate positioned above saidy pipe andmembers, partition plates mounted in said members in a manner to form a plurality of radially spaced inner and outer passages within said members, outwardly extending inclined flanges formed adjacent and extending along the upper edges of said partition plates in a manner to restrict the cross-sectional draft area of said outer passages adjacent the upper edges of said plates, and outwardly inclined flanges formed adjacent and extending along the sides of said notches in a manner to restrict the cross-sectional draft area. of said inner passages adjacent the upper edge of saidy pipe.

7. In a chimney top or ventilator, the combination with a ypipe having a plurality of annularly spaced notches formed in its upper edge, of a plurality of U-shaped draft members uniformly spaced around said 'pipeandf extending above the upper edge thereof, said members being adapted to co-oper'ate with the outer faceof said pipe in a manner to form a plurality yof rair passages, partition plates mounted in the respective U-sha ed members in a. `manner to provide a plura ity of radially spacedy passages within said members, the upper ends of said plates being adapted to terminate in a plane yabove the upper edge of said pipe and below the upper ends of said members, and a cap plate positioned above said members, partition plates and pipe. j

8. In a chimney top or ventilator', the combination with ak-pipe having a plurality of annularly spacedV-shaped notches formed' in its upper edge, of a plurality of U-shaped upwardly tapereddraft members annularly spaced around said pipe and4 extending abo-ve the upper edge thereof, said members being adapted to co-operate with the outer face of said pipe in a manner to form a plurality of air passages adjacent said notches, partition plates mounted inthe respective U-shaped members in a manner to provide a plurality of radially spaced upwardly tapered'passages within said members, the upper ends of said plates being adapted to terminate in a plane above the upper edge of said pipe and below the upper ends of said members, and al cap plate positioned above said niembers, partition plates and pipe.

9. In a chimney top or ventilator, the combination with a pipe having a plurality of annularly spaced V-shaped notches and upwardly inclined flanges formed adjacent its upper edge and ralong the sides of said notches, of a plurality of U-shapedupwardly tapered draft members annularly spaced around said pipe and extending above the upper edge thereof, said members being adapted to co-operatey with the outer face of said pipe in a manner to form a plurality upper edge ,ofvvsaidfpipe and below the upof air,` passages adj acent said notches, partiportions `mounted in tlierespective U-shaped members in a'manner to provide a plurality iof,radiallyspaced upwardly tapered pas sages within the saidmembers, the upper ends of said plates being adapted to termii nate ina plane above said notches and the pei ends of said'members and a capplate positioned` above ysaid members, .partition plates 'and pipe.y f

" f y10.-.In a chimney top ory iventilator,` lthe combinationwith a pipehaving a plurality;

lof V-shapednotches formed =initsjupper -vedge,'ofy a plurality'of U-shaped draft inemc bers' uniformly spacedy around saidk pipe adjacentsaid notches and ycol-operable with said ypipe in a manner to form a" plurality of 'upwardly tapered passages outside saidy pipe andadjacent'said'notches, a cap plate positioned above said pipe and members, partitionplates `mounted in saidy member-sin a ymanner to-y form a yplurality of radially spaced inner* and outer `passages f within saidr to the upper edges of saidpartition plates in a manner to restrict the cross-sectional ydraft areaof said'outer passages adjacent the/upperiedges of said plates. Y

fmembers, and yupwardly inclinedflangesadjacent and extending;substantially parallel ,'11. In a kchimney top orl ventilator,'the

combination with a pipe having a `plurality of V-shap'ed notches formed in7 its upper edge, of aplurality of U-shaped draft'mem- :bersuniformly spacedv around said pipe ads jacent said notches and co-operable with'said pipein amanner to form a plurality of-upwardly tapered kpassages' outside said ypipe land'adjacent `said notches, a cap plate positioned above said pipe and ymembers,y partiv.tion plates mounted in said; members in a manner to *form a plurality Lof radiallyy spacedfinner and'outerl passages within said members, and upwardly inclined flanges adf jacent andfextending substantiallyH parallel to the sides of-said notches in a manner to restrict the cross sectional draft area of said inner rpassages'adjacent the upper edge of said pipe.

l2. In a chimney ytopor ventilator, the

`combination ywith a pipe having a plurality of V-shaped notches formed in its upper edge, of a plurality of U-shaped draft memj bers uniformly spaced around said pipeand y adjacent said notches and co-operable ywith f said pipe in a manner to form a plurality of upwardly tapered passages outside said pipe and adjacent said notches, a cap plate posi` tioned above said pipe and members, partition plates mounted in said members in a manner to form ya plurality of. radially spaced inner and outery passages within saidy members, upwardly extending inclined flanges adjacent and extending substantially parallel to the upper edges of said partition plates in a manner to restrict the cross-sectional draft area of said outer passages adjacent the upper edges orp said plates, and upwardly extending inclined flanges adjacent and extending substantially parallel to the sides of said notches in a manner to restrict the cross-sectional draft area of said inner passages adjacent the upper edge of said pipe.

15.` In a chimney top or ventilator, the

combination with a pipe having a plurality A of annularly spaced il-shaped notches and upwardly inclined flanges Jformed adjacent its upper edge, of a plurality of U-shaped upwardly tapered draft members annularly vspaced around said pipe and extending above the upper edge thereof, said members being adapted to co-operate with the outer face of said pipe in a manner to form a plurality of air passages adjacent said notches, inclined partition plates mounted in the respective U-shaped members in a manner-to provide a plurality of radially spaced upwardly tapered passages within the said members, flanges positioned in said members adjacent the upper edge of said plates, the upper ends of: said plates being adapted to terminate in a plane above said notches and the upper edge of said pipe andbelow the upper ends of said members, and a cap plate positioned above said members, kpartition plates and pipe.

14.111 a chimney top or ventilator, the combination with a pipe, of a plurality of U- shaped members positioned around said Vpipe j and co-operable therewith in a mannerto form a plurality of upwardly tapered passages outside saidfpipe, a cap plate positioned above said pipe and members, parti tion plates mounted in said members in a Y manner to form a plurality of radially spaced passages within said members and Y flanges adjacent the upper edges of Said partition plates.`

In testimony whereof I have signed my name to this specification, on this 15th day 'Y of November, HAROLD KNUTSON.' 

